Locomotive-engine



(No Modem H. F. SHAW.

LOGOMOTIVE ENGINE. No. 267,726. Patented Nov. 21, 1882.

N. Pn'zns. piwamumusmpnnf. wnningmn. nA a UNITED STATES PATENT OEEICE.

HENRY F. SHAW, OF BOSTON, MASSACHUSETTS.

LoCoMoT-lvE-ENGINE.

SPECIFICATION forming part of Letters Patent No. 267,726, dated November:21, 1882.

Application filed August 18, 1882. (No model.) l

To all whom 'it may concer/n:

Be it known that I, HENRY F. SHAW, a citizen ot the United States,residing at Boston, in the county of Suffolk and State of Massachusetts,have invented a new and useful Improvement in Locomotive-Engines, ofwhich the following is a specification, reference being had to theaccompanying drawings.

My invention relates to the propelling mechanism of locomotive-engines,its object being, while applying the force of the steam in a simple andett'ective manner and securing unison of revolution of thedriving-wheels, to dispense with the parallel rods employed in ordinarylocomotives, and much of the weight of the connecting-rods on thewheels, and to more nearly balance the Weight on the drivingwheels.

My` invention consists in the employment of two steam-cylinders uponeach side ot' the locomotive, one cylinder above the other, theirpistons being connected by suitable rods to a bar, which is pivoted sothat it may oscillate,

and in said bar' connected by suitable rods to the crank-pinsV on thedriving-wheels.

In the drawings, Figure l is a side view of so much of alocomotive-engine embodying my invention as serves for illustration ot'the same. Fig. 2 is a plan view, the boiler being removed.

It is sufficient for present purposes to refer only to those parts onone side of the engine, the arrangement being similar on both sides,bearing in mind that the crank-pins on the two wheels on either axle areset quartering with reference to each other, as in ordinary locomotives,and as illustrated in Fig. 2. On each side of the engine I place twosteamcylinders, A and B, one above the other. These cylinders, may be atthat dista-nce apart and located on the frame, and with reference to theboiler, as may be deemed best. There may be one valve-chest, C, for thetwo cylinders, and the valve therein may he so constructed that it willbe adapted for both cylinders, and may be operated by one valve-rod, D.The mechanism for operating the valve is not shown in the drawings.It'may be such as is now in common use. Each piston-rod is secured to across-head, one rod, E, tothe cross-head F, to slide on the ways orguides a,

and the other rod', G, to the cross-head H, to slide on ways or guidesb.

Between the two driving-wheels, on each side of the engine, a', bar, I,is pivoted. This bar is pivoted midway its length on a pin or trunnion,J, xed to the frame of the engine. To this bar I are pivoted twoconnecting-rods, L and M, oppositely,with reference to the pivotpin J,as shown. 'Ihe other ends of these connecting-rods are pivoted, one rod,L, to the cross-head F and the other rod, M, to the cross-head H. Alsopivoted to the bar I are two other connecting-rods, N and O, one aboveand the other below the pivot-pin J. The other ends of theseconnecting-rods are pivoted, one rod, N, on the crank-pin c on thedriving-wheel P and the other rod, O, on the crankpin d on the wheel B.

By means of the pistons in steam-cylinders A and B and theconnecting-rods L and M the bar I is oscillated, and through theoscillation of bar I and by means of the connectingrods N and O thedriving-wheels l?A and R are revolved, and they must revolve in unisonwithout employing any otherthat is, parallel-rods.

Various modifications of the device may be made and still my inventionbe involved either 'l as to a part or the whole. The driving-wheels maybe caused to revolve in unison by the employment of the oscillating barI and the connecting-rodsN and O,while the Wheels may be driven by othermeans-as, for instance, by rods connecting their crank-pins, onevorboth, with one or two pistons. The connecting-rods N and O may bepivoted nearer to or farther from the pivot-pin or trunnion J than theconnecting-rods L and M. The vibration of the connecting-rods L and Mbeing through so short distance, th"`e piston-rods E and G might beextended to the bar Iand connected to the same by other means than saidconmeeting-rods, to oscillate said bar and allow for this slightvertical movement.

I claim as my inventionl. In a locomotive-engine, two steam-cylindersupon each side, one cylinder located above the other, the pistons insaid cylinders being connected to a pivoted-bar, by which means said baris oscillated, substantially as and for the purpose set forth.

IOCl

2. In a 1ocomotive-engine,the combination L and M, pivoted bar I,connecting-rods N and of two driving-Wheels, P and R, havingorank- O7and' Wheels P and R, having crank-pins c pins c and d, connecting-rods Nand'O, and and substantially as setforth. pivoted bar I, substantiallyas and for the pur- HENRY F. SHAW. 5 pose set forth. Witnesses:

3. The combination of cylinders A and B EDW. DUMMER, with pistons andpiston-rods, connecting-rods JOSEPH SELIG.

